\ocumentclass{article}
\usepackage{graphicx}

\begin{document}

\title{Introduction to \LaTeX{}}
\author{Author's Name}

\maketitle

\begin{tabular}{lll}
   1.1 & 1.2 & 1.3 \\
   2.1 & 2.2 & 2.3 \\
\end{tabular}


\end{document}
